Daily Almanac for
Nov 30, 2009
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Yuka'wa me"son



Physics.
a hypothetical elementary particle with finite rest mass, whose exchange between nucleons would account for the strong short-range forces between nucleons: subsequently identified as the pion.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

Yukawayukky
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